#1/usr/bin/env sh

list_after_n() {
  echo "$1" | sort -r | tail -n +"$2" | tr '\n' ' '
}

ARCHIVE_DIR=${ARCHIVE_DIR:-"/archive"}
FILE_QUOTA=${FILE_QUOTA:-7}

old_archives=$( find "$ARCHIVE_DIR" -maxdepth 1 -type f -printf "%f\n" )
old_dirs=$( find "$ARCHIVE_DIR" -maxdepth 1 -mindepth 1 -type d -printf "%f\n"  )

last_n_archives=$( list_after_n "$old_archives" "$FILE_QUOTA" )
last_n_dirs=$( list_after_n "$old_dirs" "$FILE_QUOTA" )

for archive in $last_n_archives; do
  rm "$ARCHIVE_DIR/$archive"
done

for dir in $last_n_dirs; do
  rm -r "$ARCHIVE_DIR/$dir"
done